20021100110102 has 48 divisors (see below), whose sum is σ = 39602176089840. Its totient is φ = 7503570188352.

The previous prime is 20021100110071. The next prime is 20021100110107. The reversal of 20021100110102 is 20101100112002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021100110107) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 413532353 + ... + 413580764.

It is an arithmetic number, because the mean of its divisors is an integer number (825045335205).

Almost surely, 2^{20021100110102} is an apocalyptic number.

20021100110102 is a deficient number, since it is larger than the sum of its proper divisors (19581075979738).

20021100110102 is a wasteful number, since it uses less digits than its factorization.

20021100110102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827113165 (or 827113158 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20021100110102 its reverse (20101100112002), we get a palindrome (40122200222104).

The spelling of 20021100110102 in words is "twenty trillion, twenty-one billion, one hundred million, one hundred ten thousand, one hundred two".